CA2638177C - Charcoal / air bbq combustion chamber assembly - Google Patents
Charcoal / air bbq combustion chamber assembly Download PDFInfo
- Publication number
- CA2638177C CA2638177C CA 2638177 CA2638177A CA2638177C CA 2638177 C CA2638177 C CA 2638177C CA 2638177 CA2638177 CA 2638177 CA 2638177 A CA2638177 A CA 2638177A CA 2638177 C CA2638177 C CA 2638177C
- Authority
- CA
- Canada
- Prior art keywords
- air
- ash
- plenum
- assembly
- charcoal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/07—Roasting devices for outdoor use; Barbecues
- A47J37/0786—Accessories
- A47J37/079—Charcoal igniting devices
Abstract
Device comprising a funnel shaped perforated combustion chamber within an annular air plenum comprising a cooking zone and a fire grate / ash exit into the lower ash storage container.
Common problems to resolve (1) Slow start up / flame spread. (2) No clean convenient ash disposal.
(3) No practical temperature control. (4) No flare up control.
Device Solutions A variable speed blower supplying air into the combustion chamber, from plenum through perforations. (1) Faster air velocity = faster bum rate and start up.
(2) Air stimulation of ash bed thereby assisting gravitational effect and wall slope to precipitate unstable ash downwardly through said ash exit / fire grate into ash storage container.
(3) Said air also enabling variable temperature control. (4) A secondary variable speed blower is affixed to the ash container and coupled by duct to the 360 degree peripheral slot Lateral Air Sheet Diffuser disposed on the central vertical axis medially between grill and heat source. Said diffuser projecting a horizontal air sheet and instantly blowing flare-ups out of the cooking zone.
Common problems to resolve (1) Slow start up / flame spread. (2) No clean convenient ash disposal.
(3) No practical temperature control. (4) No flare up control.
Device Solutions A variable speed blower supplying air into the combustion chamber, from plenum through perforations. (1) Faster air velocity = faster bum rate and start up.
(2) Air stimulation of ash bed thereby assisting gravitational effect and wall slope to precipitate unstable ash downwardly through said ash exit / fire grate into ash storage container.
(3) Said air also enabling variable temperature control. (4) A secondary variable speed blower is affixed to the ash container and coupled by duct to the 360 degree peripheral slot Lateral Air Sheet Diffuser disposed on the central vertical axis medially between grill and heat source. Said diffuser projecting a horizontal air sheet and instantly blowing flare-ups out of the cooking zone.
Description
ABSTRACT OF THE SPECIFICATION
Charcoal /Air BBQ Combustion Chamber Assembly Device comprising a funnel shaped perforated combustion chamber within an annular air plenum comprising a cooking zone and a fire grate / ash exit into the lower ash storage container.
Common problems to resolve (1) Slow start up / flame spread. (2) No clean convenient ash disposal.
(3) No practical temperature control. (4) No flare up control.
Device Solutions A variable speed blower supplying air into the combustion chamber, from plenum through perforations. (1) Faster air velocity = faster bum rate and start up.
Charcoal /Air BBQ Combustion Chamber Assembly Device comprising a funnel shaped perforated combustion chamber within an annular air plenum comprising a cooking zone and a fire grate / ash exit into the lower ash storage container.
Common problems to resolve (1) Slow start up / flame spread. (2) No clean convenient ash disposal.
(3) No practical temperature control. (4) No flare up control.
Device Solutions A variable speed blower supplying air into the combustion chamber, from plenum through perforations. (1) Faster air velocity = faster bum rate and start up.
(2) Air stimulation of ash bed thereby assisting gravitational effect and wall slope to precipitate unstable ash downwardly through said ash exit / fire grate into ash storage container.
(3) Said air also enabling variable temperature control. (4) A secondary variable speed blower is affixed to the ash container and coupled by duct to the 360 degree peripheral slot Lateral Air Sheet Diffuser disposed on the central vertical axis medially between grill and heat source. Said diffuser projecting a horizontal air sheet and instantly blowing flare-ups out of the cooking zone.
t Charcoal / Air BBQ Combustion chamber assembly Field of the Invention / Prior Art This invention relates to Outdoor BBQ grills, particularly those fuelled by charcoal.
Repeated surveys confirm that over 70% of the population that use a BBQ prefer the taste of foods cooked over an open fire fuelled by natural charcoal. However, despite this overwhelming preference, the majority of BBQs purchased are fuelled by gas.
Charcoal units have not been significantly developed or modernised for 20 to 30 years.
They still produce lots of messy ash that requires manual removal which can be difficult to clean up. Ignition is still frequently achieved by pouring a volatile fuel over charcoal to ignite said fuel / charcoal. Flame development and spread throughout the charcoal bed is very slow. Temperature control frequently includes the opening and closing of the BBQ lid. In the case of excessively high temperatures it is not unusual to reduce the temperature by spraying water on the fuel bed.
Flare-ups / fires frequently occur when meat fats drip onto hot Charcoal embers. Said fats instantly vaporise and then ignite, sometimes violently. These Flare-ups can burn and carbonise foods / meats. This carbonisation has become of real concern in the past few years as more credible research, links burnt / carbonised meats to production of carcinogens. There has been no effective Flare-up elimination system / device to date.
In all records searched, lack of significant innovation in this field is conspicuous by its absence. There have been no serious efforts to solve the long standing real problems that could have helped to ensure the viability of the charcoal BBQ.
CANADIAN CLASSES SEARCHED:
U.S. CLASSES SEARCHED:
99/339, 340, 352-355, 357, 389, 400, 401, 421 H, 421 HH, 444-450, 481, 482 1126/121, 242, 25A, 25AA, 25C, 25R, 276, 290, 299D, 41 R, 51 R 1 21 9/400 1248/509 1270/300 INTERNATIONAL CLASSES SEARCHED:
A47J 37/06, 37/07 1 F24B 1/00, 1/20, 1/182 1 F23B 60/00, 60/02, 70/00 4/788/905. VON KUHORN. FAN.
3/266/478. BOOTH. FAN.
3/159/119. HOTTENROTH. FAN.
3/324/788. LA. FRANCE. FAN.
3/326/201. MURRAY. FAN.
t Charcoal / Air BBQ Combustion chamber assembly Field of the Invention / Prior Art This invention relates to Outdoor BBQ grills, particularly those fuelled by charcoal.
Repeated surveys confirm that over 70% of the population that use a BBQ prefer the taste of foods cooked over an open fire fuelled by natural charcoal. However, despite this overwhelming preference, the majority of BBQs purchased are fuelled by gas.
Charcoal units have not been significantly developed or modernised for 20 to 30 years.
They still produce lots of messy ash that requires manual removal which can be difficult to clean up. Ignition is still frequently achieved by pouring a volatile fuel over charcoal to ignite said fuel / charcoal. Flame development and spread throughout the charcoal bed is very slow. Temperature control frequently includes the opening and closing of the BBQ lid. In the case of excessively high temperatures it is not unusual to reduce the temperature by spraying water on the fuel bed.
Flare-ups / fires frequently occur when meat fats drip onto hot Charcoal embers. Said fats instantly vaporise and then ignite, sometimes violently. These Flare-ups can burn and carbonise foods / meats. This carbonisation has become of real concern in the past few years as more credible research, links burnt / carbonised meats to production of carcinogens. There has been no effective Flare-up elimination system / device to date.
In all records searched, lack of significant innovation in this field is conspicuous by its absence. There have been no serious efforts to solve the long standing real problems that could have helped to ensure the viability of the charcoal BBQ.
CANADIAN CLASSES SEARCHED:
U.S. CLASSES SEARCHED:
99/339, 340, 352-355, 357, 389, 400, 401, 421 H, 421 HH, 444-450, 481, 482 1126/121, 242, 25A, 25AA, 25C, 25R, 276, 290, 299D, 41 R, 51 R 1 21 9/400 1248/509 1270/300 INTERNATIONAL CLASSES SEARCHED:
A47J 37/06, 37/07 1 F24B 1/00, 1/20, 1/182 1 F23B 60/00, 60/02, 70/00 4/788/905. VON KUHORN. FAN.
3/266/478. BOOTH. FAN.
3/159/119. HOTTENROTH. FAN.
3/324/788. LA. FRANCE. FAN.
3/326/201. MURRAY. FAN.
5/168/860. KIBOURIAN. FAN.
3/327/697. BERLANT. FAN.
4/850/353. DELLRUD. FAN.
KR20030049623 YONG SUB. CHARCOAL COOKING OVEN.
4/287/870. JOHNSON. BLOWER. MULTI USE HYBRID ADD-ON.
Meaningful efforts to improve operator convenience have been virtually restricted to reducing the time required to fully ignite a bed of charcoal using a small fan / blower.
Currently there are few viable alternatives to gas powered BBQs as these have also not been significantly updated other than having the ability to control the gas burners and utilize IR emitters. Lack of messy charcoal ash is substituted by gas heated /
vaporised fats and grease which deposits everywhere and which requires considerable clean up.
Flare-up fires are frequent with no effective control other than closing the lid. Attempts to simulate / duplicate the real charcoal taste have been abandoned and the feel good feature of a real fire has never existed.
SUMMARY OF THE INVENTION
Considering the situation regarding the types of BBQ devices currently available, the present invention introduces innovative and practical concepts into charcoal bbq combustion chamber design. Said innovations substantially resolving known limitations, disadvantages and problems inherent in previous art. This has resulted in a device not anticipated / made obvious or implied by any known prior art. This original design includes simple air systems that permit control over all aspects of the combustion process. The combustion chamber assembly is designed to preclude random ambient air from said assembly, this is achieved by the heat radiated from combustion chamber, utilizing upward convection currents from heating zone. All air required for combustion is supplied from the plenum into the combustion chamber through said perforations as previously described. Said primary combustion air is supplied in metered amounts by a variable speed electric blower mounted to the plenum and controlled by potentiometer.
This enables improved control of the ignition process / burn rate and temperature requirements. Suppression of Flare-ups is achieved by projecting a Lateral Air Sheet between the grill and the cooking zone from a 360 degree air diffuser head supplied by a secondary variable speed electric blower affixed to the Ash Storage Container and controlled by a potentiometer.
DESCRIPTION
It is the object of the device to resolve the following major areas of operator inconvenience (1) Unsafe ignition using volatile liquids, and slow flame spread throughout fuel charge.
(2) Poor cooking temperature control, usually assisted by opening or closing BBQ
cover / lid. Or, when too hot by spraying with water to cool.
(3) Flare-up fires. These occur frequently as fats drip off meat onto the hot cooking surface where it vaporises ignites and burns foods (4) Manual ash clean up. Very dirty messy chore.
(1) FAST SAFE START UP / EVEN FLAME SPREAD
Initial combustion commences by placing adequate food grade fire starters on the fire grate and loosely covering said igniters to a reasonable depth with short pieces of charcoal Using a propane torch, the fire starters are ignited through spaces that have been left in the charcoal. When it is evident that combustion is established, combustion air is introduced through the perforations at low initial velocity into the combustion chamber from the plenum.
Note. As air velocity is progressively increased, burn rate and flame spread increases very rapidly. Do not leave controls unattended. Charcoal should be added until fire bed is satisfactory. Note use a quality temperature gauge with long probe.
(2) TEMPERATURE CONTROL
It should be noted that temperatures can increase very rapidly, however it takes longer for hot coals to cool down. Heat should be increased slowly without overshooting the required temperature when possible. When overshooting occurs, reduce temperature by reducing air supply until desired temperature is reached. It is also possible to reduce the heat from below the cooking grill by operating the Lateral Air Sheet Diffuser which projects cooling air throughout the cooking zone below said grill. This may not assist in extreme cases. Move food to higher grill.
(3) FIRES AND FLARE-UP CONTROL
Effective reduction of smoke / fumes and flare-ups may be achieved by activating the Lateral Air Sheet Diffuser system. Said system projecting a variable velocity 360 degree Lateral Air Sheet from the peripheral slot diffuser located on the central vertical axis, medially between the grill and the cooking zone, thereby controlling flare-ups that occur, this prevents the burning / carbonisation of meats etc., which as previously mentioned can result in serious health complications.
(4) AUTOMATIC ASH / REMOVAL / STORAGE
It will be noted that the fire bed slowly drops as numerous air jets through the combustion chamber wall perforations agitates ash in the fuel bed and on the combustion chamber sloped wall. This continuous agitation of ash on the 45 degree sloped wall, combined with the inevitable effect of gravity, results in ash moving downwardly through the fire grate and into the Ash Storage Container for later disposal through an opening door / port in its base. Ash flow can be assisted by increasing air velocity from the combustion chamber air variable speed electric blower.
DETAILED DESCRIPTION
BBQ COMBUSTION CHAMBER ASSEMBLY
Please note enclosed drawing Figure 2b, this illustrates a cross sectional view of the combustion chamber assembly as described in this section. Components described are like numbered in relative text and on drawing for clarity.
The device consists of two components. The first component being a large diameter Annular Air Plenum (14) having a right angled triangular cross section. The inner sloped wall (36) of the triangle (14) defining therein a funnel shaped combustion chamber (8) having a large diameter (40) open top cooking zone, and a smaller diameter (66) open bottom which functions as an ash exit. Said ash exit also locating a fire grate (38) which supports the fuel charge.
It will be noted that the sloped wall (36) separates the inner combustion chamber (8) from the outer annular / air plenum (14). The wall has a plurality of perforations (12) spaced radially through 360 degrees on several evenly spaced lateral concentric circles, commencing upwardly from the fire grate (38) towards the cooking surface.
Said perforations (12) enabling air to pass at pre-selected speeds from the plenum (14) through said dividing wall into the combustion chamber (8), thereby controlling combustion. Said perforations are inclined upwardly towards the central axis (46) at approx 45 degrees providing optimum flame spread throughout the chamber (8).
Combustion air is supplied to the plenum by a coupling duct (52) operative between plenum and variable speed electric blower (32) controlled by a potentiometer.
Said blower affixed externally to the outer plenum wall. This airflow enabling a satisfactory degree of control over the combustion process. Finally solving the problem of long slow start ups and temperature control.
The second component consists of a cylindrical container of smaller diameter which serves as an ash storage container (6). Said container aligns with and is removably attached by bolts (18) over the smaller diameter ash exit hole (66) in the base of the combustion chamber assembly, thereby enabling ash to pass freely from said combustion chamber (8) into the ash storage container (6), which has a close fit sliding door / port (68) secured by screw clamps (72) in its base. Ash is quickly cleanly and easily dumped when cool into any suitable container for disposal. This solving the problems of messy ash clean up. When operable said ash storage system precludes ambient air.
The ash container (6) houses a supply duct (10) disposed on the central vertical axis of said combustion chamber assembly (2). Said duct supplying air to the 360 degree Lateral Air Sheet Diffuser head (46) from a variable speed electric blower (34) controlled by a potentiometer mounted externally on the ash container (6).
Said diffuser operable medially between grill and heating zone.
The 360 degree peripheral slot diffuser (46) projects a horizontal air sheet across the cooking zone, instantly blowing any flames out of said cooking zone before any food is carbonised / burnt. This finally solved the problem of how to prevent food being burnt /
carbonised,
3/327/697. BERLANT. FAN.
4/850/353. DELLRUD. FAN.
KR20030049623 YONG SUB. CHARCOAL COOKING OVEN.
4/287/870. JOHNSON. BLOWER. MULTI USE HYBRID ADD-ON.
Meaningful efforts to improve operator convenience have been virtually restricted to reducing the time required to fully ignite a bed of charcoal using a small fan / blower.
Currently there are few viable alternatives to gas powered BBQs as these have also not been significantly updated other than having the ability to control the gas burners and utilize IR emitters. Lack of messy charcoal ash is substituted by gas heated /
vaporised fats and grease which deposits everywhere and which requires considerable clean up.
Flare-up fires are frequent with no effective control other than closing the lid. Attempts to simulate / duplicate the real charcoal taste have been abandoned and the feel good feature of a real fire has never existed.
SUMMARY OF THE INVENTION
Considering the situation regarding the types of BBQ devices currently available, the present invention introduces innovative and practical concepts into charcoal bbq combustion chamber design. Said innovations substantially resolving known limitations, disadvantages and problems inherent in previous art. This has resulted in a device not anticipated / made obvious or implied by any known prior art. This original design includes simple air systems that permit control over all aspects of the combustion process. The combustion chamber assembly is designed to preclude random ambient air from said assembly, this is achieved by the heat radiated from combustion chamber, utilizing upward convection currents from heating zone. All air required for combustion is supplied from the plenum into the combustion chamber through said perforations as previously described. Said primary combustion air is supplied in metered amounts by a variable speed electric blower mounted to the plenum and controlled by potentiometer.
This enables improved control of the ignition process / burn rate and temperature requirements. Suppression of Flare-ups is achieved by projecting a Lateral Air Sheet between the grill and the cooking zone from a 360 degree air diffuser head supplied by a secondary variable speed electric blower affixed to the Ash Storage Container and controlled by a potentiometer.
DESCRIPTION
It is the object of the device to resolve the following major areas of operator inconvenience (1) Unsafe ignition using volatile liquids, and slow flame spread throughout fuel charge.
(2) Poor cooking temperature control, usually assisted by opening or closing BBQ
cover / lid. Or, when too hot by spraying with water to cool.
(3) Flare-up fires. These occur frequently as fats drip off meat onto the hot cooking surface where it vaporises ignites and burns foods (4) Manual ash clean up. Very dirty messy chore.
(1) FAST SAFE START UP / EVEN FLAME SPREAD
Initial combustion commences by placing adequate food grade fire starters on the fire grate and loosely covering said igniters to a reasonable depth with short pieces of charcoal Using a propane torch, the fire starters are ignited through spaces that have been left in the charcoal. When it is evident that combustion is established, combustion air is introduced through the perforations at low initial velocity into the combustion chamber from the plenum.
Note. As air velocity is progressively increased, burn rate and flame spread increases very rapidly. Do not leave controls unattended. Charcoal should be added until fire bed is satisfactory. Note use a quality temperature gauge with long probe.
(2) TEMPERATURE CONTROL
It should be noted that temperatures can increase very rapidly, however it takes longer for hot coals to cool down. Heat should be increased slowly without overshooting the required temperature when possible. When overshooting occurs, reduce temperature by reducing air supply until desired temperature is reached. It is also possible to reduce the heat from below the cooking grill by operating the Lateral Air Sheet Diffuser which projects cooling air throughout the cooking zone below said grill. This may not assist in extreme cases. Move food to higher grill.
(3) FIRES AND FLARE-UP CONTROL
Effective reduction of smoke / fumes and flare-ups may be achieved by activating the Lateral Air Sheet Diffuser system. Said system projecting a variable velocity 360 degree Lateral Air Sheet from the peripheral slot diffuser located on the central vertical axis, medially between the grill and the cooking zone, thereby controlling flare-ups that occur, this prevents the burning / carbonisation of meats etc., which as previously mentioned can result in serious health complications.
(4) AUTOMATIC ASH / REMOVAL / STORAGE
It will be noted that the fire bed slowly drops as numerous air jets through the combustion chamber wall perforations agitates ash in the fuel bed and on the combustion chamber sloped wall. This continuous agitation of ash on the 45 degree sloped wall, combined with the inevitable effect of gravity, results in ash moving downwardly through the fire grate and into the Ash Storage Container for later disposal through an opening door / port in its base. Ash flow can be assisted by increasing air velocity from the combustion chamber air variable speed electric blower.
DETAILED DESCRIPTION
BBQ COMBUSTION CHAMBER ASSEMBLY
Please note enclosed drawing Figure 2b, this illustrates a cross sectional view of the combustion chamber assembly as described in this section. Components described are like numbered in relative text and on drawing for clarity.
The device consists of two components. The first component being a large diameter Annular Air Plenum (14) having a right angled triangular cross section. The inner sloped wall (36) of the triangle (14) defining therein a funnel shaped combustion chamber (8) having a large diameter (40) open top cooking zone, and a smaller diameter (66) open bottom which functions as an ash exit. Said ash exit also locating a fire grate (38) which supports the fuel charge.
It will be noted that the sloped wall (36) separates the inner combustion chamber (8) from the outer annular / air plenum (14). The wall has a plurality of perforations (12) spaced radially through 360 degrees on several evenly spaced lateral concentric circles, commencing upwardly from the fire grate (38) towards the cooking surface.
Said perforations (12) enabling air to pass at pre-selected speeds from the plenum (14) through said dividing wall into the combustion chamber (8), thereby controlling combustion. Said perforations are inclined upwardly towards the central axis (46) at approx 45 degrees providing optimum flame spread throughout the chamber (8).
Combustion air is supplied to the plenum by a coupling duct (52) operative between plenum and variable speed electric blower (32) controlled by a potentiometer.
Said blower affixed externally to the outer plenum wall. This airflow enabling a satisfactory degree of control over the combustion process. Finally solving the problem of long slow start ups and temperature control.
The second component consists of a cylindrical container of smaller diameter which serves as an ash storage container (6). Said container aligns with and is removably attached by bolts (18) over the smaller diameter ash exit hole (66) in the base of the combustion chamber assembly, thereby enabling ash to pass freely from said combustion chamber (8) into the ash storage container (6), which has a close fit sliding door / port (68) secured by screw clamps (72) in its base. Ash is quickly cleanly and easily dumped when cool into any suitable container for disposal. This solving the problems of messy ash clean up. When operable said ash storage system precludes ambient air.
The ash container (6) houses a supply duct (10) disposed on the central vertical axis of said combustion chamber assembly (2). Said duct supplying air to the 360 degree Lateral Air Sheet Diffuser head (46) from a variable speed electric blower (34) controlled by a potentiometer mounted externally on the ash container (6).
Said diffuser operable medially between grill and heating zone.
The 360 degree peripheral slot diffuser (46) projects a horizontal air sheet across the cooking zone, instantly blowing any flames out of said cooking zone before any food is carbonised / burnt. This finally solved the problem of how to prevent food being burnt /
carbonised,
Claims (9)
1. A Charcoal BBQ Grill assembly comprising:
A circular annular air plenum having a right angled triangular cross section, with the inner plenum wall sloping down from the large diameter opening at the top of said annular air plenum to the smaller diameter opening in the base of said plenum;
said sloped inner plenum wall defining an open funnel shaped combustion space having an open top heating space of large diameter and a smaller diameter opening in the plenum base, thereby forming a bottom ash exit which includes a fire grate to support the fuel charge; the sloped inner plenum wall of said combustion space having a plurality of perforations, said perforations being radially spaced in concentric circles extending in even increments from above said fire grate upwardly towards the top of the combustion zone; said annular air plenum further comprising an air inlet duct installed into the plenum base to which is mounted the primary variable speed blower, said blower being controlled by a potentiometer to supply combustion air into said annular air plenum thereby controlling air distribution into the combustion zone through said perforations;
the BBQ grill assembly further comprising an ash storage assembly fitted to the bottom ash exit, said ash storage assembly having a secondary air duct and a secondary variable speed blower also controlled by a potentiometer fitted into said ash storage assembly;
said BBQ grill assembly further comprising a 360 degree horizontal slot air diffuser positioned on the central vertical axis of said combustion chamber above the top of said combustion space and operable to project a lateral air sheet medially between the top of said combustion space and the cooking grill, wherein said lateral air sheet intercepts and disperses flare ups and smoke caused by meat fats dripping onto hot coals.
A circular annular air plenum having a right angled triangular cross section, with the inner plenum wall sloping down from the large diameter opening at the top of said annular air plenum to the smaller diameter opening in the base of said plenum;
said sloped inner plenum wall defining an open funnel shaped combustion space having an open top heating space of large diameter and a smaller diameter opening in the plenum base, thereby forming a bottom ash exit which includes a fire grate to support the fuel charge; the sloped inner plenum wall of said combustion space having a plurality of perforations, said perforations being radially spaced in concentric circles extending in even increments from above said fire grate upwardly towards the top of the combustion zone; said annular air plenum further comprising an air inlet duct installed into the plenum base to which is mounted the primary variable speed blower, said blower being controlled by a potentiometer to supply combustion air into said annular air plenum thereby controlling air distribution into the combustion zone through said perforations;
the BBQ grill assembly further comprising an ash storage assembly fitted to the bottom ash exit, said ash storage assembly having a secondary air duct and a secondary variable speed blower also controlled by a potentiometer fitted into said ash storage assembly;
said BBQ grill assembly further comprising a 360 degree horizontal slot air diffuser positioned on the central vertical axis of said combustion chamber above the top of said combustion space and operable to project a lateral air sheet medially between the top of said combustion space and the cooking grill, wherein said lateral air sheet intercepts and disperses flare ups and smoke caused by meat fats dripping onto hot coals.
2. The Charcoal BBQ Grill assembly of claim 1, wherein said funnel shaped combustion space holds a charge of solid fuel within said combustion space.
3. The Charcoal BBQ Grill assembly of claim 1, wherein said assembly is operable during the combustion process to substantially preclude the intrusion of ambient air into the combustion space.
4. The Charcoal BBQ Grill assembly of claim 1, wherein said fire grate separates the combustion space from the ash exit.
5. The Charcoal BBQ Grill assembly of claim 1, wherein said ash storage assembly includes an ash chute attached to the ash exit and an ash storage container removably attached to the ash chute.
6. The Charcoal BBQ Grill assembly of claim 5, wherein the secondary air supply duct is coupled to the ash storage assembly, said assembly substantially precluding the entry of ambient air into system when the ash storage container opening port is closed and the system is operable.
7. The Charcoal BBQ Grill assembly of claim 1., wherein said Lateral Air Diffuser head projects a continuous air sheet medially between grill and heating zone intercepting and dispersing flare-ups and smoke caused by meat fats dripping onto hot fuel bed.
8. The Charcoal BBQ Grill assembly of claim 1, wherein said secondary airflow delivery system includes an air blower having an air duct coupling said blower to the air diffuser means.
9. The Charcoal BBQ Grill assembly of claim 1, where agitation of ash following air stimulation, combined with the sloped inner wall and the effect of gravity on unstable ash build up, inevitably results in the precipitation and migration. of said ash from the combustion chamber walls downward and into the ash storage container.
"What I claim as my invention is a BBQ Grill that operates and is constructed as so described."
"What I claim as my invention is a BBQ Grill that operates and is constructed as so described."
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2638177 CA2638177C (en) | 2008-08-14 | 2008-08-14 | Charcoal / air bbq combustion chamber assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2638177 CA2638177C (en) | 2008-08-14 | 2008-08-14 | Charcoal / air bbq combustion chamber assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2638177A1 CA2638177A1 (en) | 2010-02-14 |
| CA2638177C true CA2638177C (en) | 2011-02-22 |
Family
ID=41697600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2638177 Expired - Fee Related CA2638177C (en) | 2008-08-14 | 2008-08-14 | Charcoal / air bbq combustion chamber assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2638177C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3064106A1 (en) * | 2015-02-19 | 2016-09-07 | Idébank Thy Holding Aps | A starting fuel preparing device for a charcoal chimney starter, and the combination of a charcoal chimney starter and the starting fuel preparing device |
| CN106923694A (en) * | 2017-04-28 | 2017-07-07 | 梁琼 | A kind of Multifunction stove with oven |
-
2008
- 2008-08-14 CA CA 2638177 patent/CA2638177C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2638177A1 (en) | 2010-02-14 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160815 |